resize-crop | 易学教程

Crop a diagonal area from an image in WPF

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问题 I want to crop from an image using user-drawn rectangles on a canvas. The rectangles can be moved, re-sized, and rotated. When the user selects "Get Cropped Image", the area inside the rectangle should be saved in a second image location on the page, which I can do perfectly well, so long as the rectangle is not rotated. (Straight-forward use of CroppedBitmap.) However, when the rectangle is at an angle I do not know how to perform the crop. This is what I want to do (forgive my poor MS Paint

Explanation of Android Code Camera Intent + Cropping Images

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When wanting to take a photo, crop and save the image in an Android application, I use the following intent in my Java... Intent camera=new Intent(); camera.setAction(MediaStore.ACTION_IMAGE_CAPTURE); camera.putExtra("crop", "true"); camera.putExtra("outputX",600); camera.putExtra("outputY", 600); camera.putExtra("aspectX", 1); camera.putExtra("aspectY", 1); camera.putExtra("scale", true); camera.putExtra("return-data", false); The above intent works great, however my Y and X are always equal. I am looking to break down the code to find out what specifies this so that I can make customisable -

Explanation of Android Code Camera Intent + Cropping Images

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问题 When wanting to take a photo, crop and save the image in an Android application, I use the following intent in my Java... Intent camera=new Intent(); camera.setAction(MediaStore.ACTION_IMAGE_CAPTURE); camera.putExtra("crop", "true"); camera.putExtra("outputX",600); camera.putExtra("outputY", 600); camera.putExtra("aspectX", 1); camera.putExtra("aspectY", 1); camera.putExtra("scale", true); camera.putExtra("return-data", false); The above intent works great, however my Y and X are always equal